Refrigerating apparatus



April 4, 1944. PH|LIIPP 2,345,714

REFRIGERATING APPARATUS Original Filed Aug. 8, 1940 INVENTOR. LQWQEI'ICEPIfll-IPP Patented Apr. 4, 1944 Lawrence A. Philipp,

Nash-Kelvin corporation of This invention relates to refrigeritingapparatus, and more particularly to refrigerating apparatus of themultiple temperature type.

The present application is a division of my co-pending application,Serial No. 351,834, filed August 8, 1940, for Refrigerating apparatus.

Another object, of myv invention is to provide an improved refrigeratingsystem which includes heat absorbing means having the different portionsthereof separated by a fixed restriction which provides for theoperation of one pbrtion Detroit, Mich, assignor to tor Corporation,Detroit, Mich a Maryland Original application August 351,834. Dividedand8, 1940, Serial No.

this application June 23,

1 Claim. (01. 62-8) sections 28 and 30 than insections 32, 35, 36 and38. This system is of the non-flooded type wherein droplets of liquidrefrigerant are passed into the heat absorbing sections, but due to theabsorption of heat very little, if any, liquid refrigerant passes intothe accumulator til. Thus, the refrigerant passing through conduit 42 isgaseous refrigerant and, as disclosed, I-have arranged. the conduit 42in thermal heat'exchange relation with the small diameter tube 48 so asto cool the liquid refrigerant passing through the at a higher pressureand temperature than the refrigerant to the heat absorbing means by asmall diameter tube,. and to pass the evaporated refrigerant in thermalheat exchange with said small diameter tube so as to pre-cool the liquidrefrigerant in the cabinet.

Further objects and advantages of the present invention will be apparentfrom the following description, reference being had to the accompanyingdrawing, wherein a preferred form of the present invention is clearlyshown.

In the drawing: v

The figure in the drawing is a diagrammatic illustration of arefrigerating system illustrating features of my invention;

Referring to the drawing, my improved refrigerating system includes amotor compressor unit 24, condenser 26, high temperature heat absorbingsections 28 and 30, low-temperature refrigcrating sections 32, 34, 3Band 38, and an accumulator 40. Evaporated refrigerant is withdrawn fromthe accumulator III through a vapor return conduit 42 whence it passesto the motor compressor unit 24 wherein it is compressed and from whichit is delivered through conduit 4 to conother portion, and to providefor the flow of liquid denser 2a. In the condenser it is liquefied and Ifrom which it is delivered to heat absorbing section 28 through a'smalldiameter tube 48 after first passing through a strainer device 50. Therefrigerant passes from the section 28 through conduit 52 to the section30. Before the section 32 from section must pass through a fixedrestriction, or small diameter tube-56.. This reduces the pressure ofrefrigerant flowing to the sections 31, ll, 36 and 38 so as to maintaina highertemperature in the passing to It, the refrigerant tube 68. Thesetwo conduits may be securedv together by solder if desired. I

The above refrigerating system may be installed in a cabinet of the typedisclosed in the aforementioned application Serial No. 351,834, of whichthe present application is a division. The system may also beoperatedand controlled as disclosed in said co-pending application.

Although only a preferred form of the invention has been illustrated,and that form described in detail, it will be apparent to those skilledin the art that various modifications may be made therein withoutdeparting from the spirit of the invention or from the scope of theappended I claim.

I claim:

A refrigerating system comprising, a condensing mechanism, hightemperature heat absorbing means and low temperature heat absorbingmeans adapted to receive liquefied refrigerant from said mechanism, asmall diameter tube for progressively reducing'the pressure of saidliquid flowing from said mechanism to said high tern"- perature means,refrigerant flow control means between said high temperature means andsaid low temperature means to. maintain one means at a higher pressureandtemperature than the other, a vapor conduit for conducting vaporizedrefrigerant from said low temperature means to said mechanism and havinga Portion thereof thermally united tosaid small diameter tube to precoola refrigerant accumulator connecting the inlet of said conduit withthe'outlet of said low temperature means. 7

LAWRENCE A. PHILIPP.

, liquid flowing through said tube. and

